Remove org.gtk.test.gschema

This is the old non-xml schema file format that we were playing around
with at one time.  Nothing is using this file anymore.

gio/tests/Makefile.am

@@ -430,7 +430,6 @@ desktop_test_files = \
 
 EXTRA_DIST += \
 	socket-common.c			\
-	org.gtk.test.gschema		\
 	org.gtk.test.gschema.xml	\
 	de.po				\
 	$(schema_test_files)		\

gio/tests/org.gtk.test.gschema

@@ -1,39 +0,0 @@
-schema org.gtk.test:
-  gettext-domain: test
-  path: /tests/
-
-  key greeting = @s "Hello, earthlings"
-    l10n: messages
-    summary: A greeting
-    description: Greeting of the invading martians
-  key farewell = @s "So long"
-    l10n: messages
-
-  child basic-types:
-    key test-boolean = @b true
-    key test-byte = @y 25
-    key test-int16 = @n -1234
-    key test-uint16 = @q 1234
-    key test-int32 = @i -123456
-    key test-uint32 = @u 123456
-    key test-int64 = @x -123456789
-    key test-uint64 = @t 123456789
-    key test-double = @d 123.456
-    key test-string = @s "a string, it seems"
-    key test-objectpath = @o "/a/object/path"
-
-  child complex-types:
-    key test-tuple = @(s(ii)) ("one",(2,3))
-    key test-array = @ai [0,1,2,3,4,5]
-
-  child localized:
-    gettext-domain: glib20
-
-    key error-message = @s "Unnamed"
-      l10n: messages
-
-  child binding:
-    key bool = @b false
-    key int = @i 0
-    key double = @d 0
-    key string = @s ""